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International Conference on Materials Science and Engineering – BRAMAT 2022
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International Conference on Materials Science and Engineering – BRAMAT 2022

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Materials Science and Engineering".

Deadline for manuscript submissions: closed (1 May 2022) | Viewed by 10354

Special Issue Editor

Prof. Dr. Daniel Munteanu

E-Mail Website
Guest Editor
Department of Materials Science, Transilvania University of Brasov - Romania, 29 Eroilor blvd., 500036 Brasov, Romania
Interests: surface engineering (diffusion processes, coatings and thin-films deposition, surfaces tribology); solid-phase transformation; heat treatment; materials characterization
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The 12th International Conference on Materials Science & Engineering—BraMat 2022, one of the largest and most recognized scientific events in the field in Southeast Europe, will be hosted by Transilvania University of Brasov, the Materials Science and Engineering Faculty, between the 9th and 12th of March, 2022. Through keynote speeches by outstanding scholars and practitioners, in parallel sessions, poster presentations, workshops and exhibitions, the Conference will reflect an overview of the latest developments in materials science and engineering. The topics of BraMat 2022 will ensure an exchange of scientific information and didactical opinions in a field with impressive dynamics, considering the research and the technological progress.

Papers published in the Special Issue “International Conference on Materials Science and Engineering—BRAMAT 2022” will be focused on the topics of metallic materials, biomaterials, ceramics, polymers and composite materials, surface engineering, nanomaterials, welding and safety engineering, additive manufacturing, engineering: education and entrepreneurship.

Prof. Dr. Daniel Munteanu
Guest Editor

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Keywords

  • metallic materials
  • biomaterials
  • ceramics, polymers and composite materials
  • surface engineering
  • nanomaterials
  • welding and safety engineering
  • additive manufacturing
  • engineering: education and entrepreneurship

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Published Papers (3 papers)

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Research

8 pages, 17379 KiB  
Article
Finite Element Comparative Analysis of Von Mises Stress Levels in Unilateral Removable Partial Denture with and without Distal Implant
by Oana Cella Andrei, Livia Alice Tănăsescu, Ioana Daniela Tărlungeanu, Magdalena Natalia Dina and Mircea Horia Tierean
Appl. Sci. 2022, 12(10), 5116; https://doi.org/10.3390/app12105116 - 19 May 2022
Viewed by 1821
Abstract
The aim of this paper is to compare von Mises stress levels and displacements between two possible designs of a class II Kennedy unilateral removable partial denture. Finite element analysis was used to compare two unilateral class II Kennedy removable partial dentures replacing [...] Read more.
The aim of this paper is to compare von Mises stress levels and displacements between two possible designs of a class II Kennedy unilateral removable partial denture. Finite element analysis was used to compare two unilateral class II Kennedy removable partial dentures replacing a mandibular second premolar, and first and second molars and with the same design, except a distal implant. The 3D model was created for a mandibular RPD with three artificial teeth and double ball attachment on the abutment teeth and a horizontal ball attachment for the implant, using Autodesk Inventor 2022 software. On the saddle, significant differences appear only when force is applied on the second molar. Association with implant increases von Mises stresses on the acrylic saddle, where displacements values are similar, and decreases von Mises stresses on the muco-osseous support, where displacements values are also similar. Regarding metal reinforcement of the denture, von Mises stress values are greater for forces applied on the second premolar in the implant situation, and smaller for forces applied on the first and second molars. Association with implant decreases von Mises stresses on the metal reinforcement of the denture only if the force is applied distally, on the two molars; in this case, the metal reinforcement is more stressed above the mesial double ball attachment, where displacements values are similar. Regarding the artificial teeth, adding a distal implant does not significantly influence the stress and displacements values, except on the second premolar where the von Mises stresses values are greater, where displacements values are similar. Although an association with an implant increases the risk of fracture for the denture, the results demonstrate that in the posterior area of the edentulous space, the denture exerts less pressure on the mucosa and subjacent bone, protecting the area against resorption. Full article
(This article belongs to the Special Issue International Conference on Materials Science and Engineering – BRAMAT 2022)
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15 pages, 5158 KiB  
Article
Use of Fourier-Transform Infrared Spectroscopy for DNA Identification on Recycled PET Composite Substrate
by Gianina Dodi, Diana Popescu, Florina Daniela Cojocaru, Mihaela Aradoaei, Romeo Cristian Ciobanu and Cosmin Teodor Mihai
Appl. Sci. 2022, 12(9), 4371; https://doi.org/10.3390/app12094371 - 26 Apr 2022
Cited by 9 | Viewed by 4911
Abstract
Fourier-transform infrared (FTIR) spectroscopy has been extensively used in plastic pollution research, since it has the advantages of great simplicity, rapidity, and low cost, being widely employed in the fingerprint identification of molecular composition and structure. The present study evaluates attenuated total reflection [...] Read more.
Fourier-transform infrared (FTIR) spectroscopy has been extensively used in plastic pollution research, since it has the advantages of great simplicity, rapidity, and low cost, being widely employed in the fingerprint identification of molecular composition and structure. The present study evaluates attenuated total reflection (ATR)–FTIR spectroscopy as a sensitive and effective assay for the identification of deoxyribonucleic acid (DNA) isolated from experimental animals. Various composite materials based on recycled polyethylene terephthalate (PET) as the main component, along with high-density polyethylene (HDPE), polypropylene (PP), and aluminum nanopowder obtained using an injection-molding machine, were used as substrate contaminants. The contamination was performed using quantified nucleic acid solution added in droplets to the clean, decontaminated samples, which were then dried and kept in a protective environment until the analysis. ATR–FTIR (with an FTIR spectrometer equipped with an ATR accessory) spectroscopy was used to analyze the bare composite materials’ substrates and the DNA-contaminated samples. To the best of our knowledge, the evaluation of PET packaging contamination with DNA species by FTIR has not been reported previously. This study demonstrated that FTIR spectroscopy could provide a rapid, sensitive, and reliable approach for screening of biochemical contaminants on composite materials based on recycled PET. Full article
(This article belongs to the Special Issue International Conference on Materials Science and Engineering – BRAMAT 2022)
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17 pages, 6507 KiB  
Article
A Proposed Method to Evaluate the Effect of Changing the Kerfing Parameters upon the Static Bending Behavior of Flexible Plywood Panels Cut by Laser
by Cristina-Daria Condoroţeanu, Lidia Gurău, Camelia Coşereanu and Sergiu-Valeriu Georgescu
Appl. Sci. 2022, 12(9), 4303; https://doi.org/10.3390/app12094303 - 24 Apr 2022
Cited by 4 | Viewed by 2012
Abstract
The purpose of this paper is to propose a method for testing the effect of varying the kerfing parameters, on the flexibilization of plywood panels for indoor applications. The evaluation was made by comparisons of the change in the MOE, MOR, and maximum [...] Read more.
The purpose of this paper is to propose a method for testing the effect of varying the kerfing parameters, on the flexibilization of plywood panels for indoor applications. The evaluation was made by comparisons of the change in the MOE, MOR, and maximum deflection, between flexibilized and non-flexibilized specimens subjected to static bending tests based on EN 310. In order to prevent the problem of sliding from the supports occurring for the flexibilized specimens, the standard specimens were modified by adding a frame and subjecting to bending just their central rail. Framed specimens of poplar plywood, of 8 mm thick, were laser cut with a rigid central rail, taken as reference and with the flexible kerfed rail. These had lengths of the flexible area of 50, 70, 90, and 110 mm and with two dimensions of the kerfing pitch, 6 and 10 mm. Very good correlations were found for MOE, MOR, and maximum deflection with the length of the kerfed area, for both values of the kerf pitch, which proves the sensitivity of the proposed method to the changes in the input parameters. The method could further serve to mathematically model the flexibility of a kerfed plywood panel by selecting the appropriate input data. Full article
(This article belongs to the Special Issue International Conference on Materials Science and Engineering – BRAMAT 2022)
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